The effectiveness of palivizumab prophylaxis for RSV infections in subgroups.

aPresence (+) or absence (–) of chronic lung disease (CLD).bNumber (No.) of hospitalization due to respiratory syncytial virus infection.Abbreviations: RSV, respiratory syncytial virus; OR, odds ratio; CI, confidence interval; GA, gestational age; CLD, chronic lung disease.

a. 慢性肺部疾病（chronic lung disease, CLD）的阳性（+）与阴性（–）发生情况。
b. 呼吸道合胞病毒（respiratory syncytial virus, RSV）感染所致住院的例数（Number, No.）。
缩写说明：RSV（respiratory syncytial virus, 呼吸道合胞病毒）；OR（odds ratio, 比值比）；CI（confidence interval, 置信区间）；GA（gestational age, 胎龄）；CLD（chronic lung disease, 慢性肺部疾病）。